If you’re reading this message, the server transfer was successfully finished. Exporting and importing all entries went without problems. Within 15 minutes I had copied all my texts to the new server. For sure there are some broken links (the coming period I am going to make them future-proof), but I will fix that the coming days.
Now all I have to do is wait until the DNS settings have been copied to all DNS servers over the world, and ask my old provider to drop jeroensangers.com.